Hand sawing-machine



(No Model.)

N. MLAWRENOE.

Hand Sewing Machine.

No. 241,031. Patented May 3,1881.

N. PETERS, Photo-Lithograph Wasfiingtun, D. C.

Uivirnn STATES ATENT emcee NATHAN M. LAWRENCE, OF CLARKSVILLE, OHIO.

HAND SAWlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 241,031, dated May 3, 1881,

Application filed October 1, 1880. (No model.)

To all whom 175 may concern Be it known that I, NATHAN M. Lnwnnnon, of Clarksville, Clinton county, Ohio, have invented new and useful Improvements in Hand Sawing-Machines, of which the following is a specification.

My invention relates to improvements in those hand sawing-machines in which the sawblade is supported and guided in a suitable frame, one of whose ends rests upon the ground, while the other end rests upon and dogs the log; and my improvements consist in a construction of the metallic portions, as hereinafter explained, which is designed to combine economy of material and manufacture with efficiency of operation.

In the accompanying drawings, Figure 1 is a side elevation of a machine embodying my improvements. Fig.2represents,in detail and to a larger scale, the metal portions of my machine.

A is a wooden beam having the customary front slot to receive the saw-blade and to guide it at the initiation of its work.

Attached to the under side of beam A, near its front end, is a spur or dog, B.

0 are two similar L-formed cheeks, pcrt'orated for bolts D, which fasten them to the beam and to legs E, of which one leg only is shown.

Projecting from the cheeks O are comicallyperforated bearings c, for conical gudgeons f on the L -formed casting F, which constitutes the heel of my bent lever F G, whose wooden portion or handle Gr is fastened to the said heel F by bolts H. Flanges I, that proj ect from the castings O and F, coact with said bolts in securing the wooden members thereto.

J is my saw-hanger, of cast metal, and having conical gudgeons jj j", of which gudgeons j occupy correspondingly conical bearings c of cheek-plates (J. Gudgeons j on same hanger occupy conical eyes or sockets k in the plates K, whose similar sockets 7c at their other extremities receive conical gudgeons f on the extremity of the L-formed heel F. A bolt, L, serves to secure to said gudgeons the plates which constitute, when thus secured, my duplex connecting-link between the heel F and my saw-hanger J. The conical gudgeons j at the lower extremity of the hanger J occupy sockets m at the forward extremities of bars M, which constitute my duplex saw-helve. The rear extremities, m, of said bars are widened vertically, to constitute jaws which receive and hold the heel of the saw-blade N.

0 is an oblong ring, which fitting over and embracing the rear extremities, m, of the two bars which constitute my saw helve M, and which being provided with a thumb-screw, P, enable the saw-blade to be firmly clamped within said rear extremities. By these means an nnperforated saw-blade is capable of being securely clamped in its helve; but for additional security orifices m are provided for the application ofa customary clam pin g-bolt when so desired. Other orifices, m, receive a bolt, Q, which serves to fasten the front extremities of the bars M securely upon the conical gudgeousj.

The duplex construction of the saw-helve M, with its described conical sockets m and its expanded jaws in, enables it to be easily and cheaply cast, and, by simply tightening the bolts P Q, to be properly closed upon the sawbla-de at its rear andnpon the hanger-godgeons at its front end. In like manner the construction of the checks 0, with their conical sockets c, casting F, flanges I 011 said cheeks O and casting F, and bolts D and H, relatively to the beam A, legs E, and handle G, enables the secure attachment of the said legs and handle to the beam by the same action of said bolts, which secures the proper snugness of fit and bearing between the gudgeons and their sockets. Should the gudgeons by long use become slack in their sockets, the slack can be taken up by a slight forward turn of the attaching-screws.

I claim as new and of my invention- 1. In a hand sawing-machine, the saw-helve consisting of the two similar bars M, whose rear extremities are broadened to form clamping-jaws for the saw-blade and occupy an 0blong ring or band, 0, provided with thumbscrew P, and whose front extremities have conical sockets m,for the corresponding gudgeons ing the conical sockets c c, and the bolts D,

j of the driving-arm or hanger J, snbstansubstantially as set forth. [0 tially as set forth. In testimony of which invention I hereunto 2. In a hand sawing-machine, the colnhinaset my hand. 5 tion, with beam A, legs E, and the l -for1ned N. M. LAWRENCE.

gudgeon-plate F of handle, and with the con- Attest: ieal gudgeons jjj of the saw-drh'ing' arm GEO. H. KNIGHT, J, of the l -f01n1e(l connecting-cheeks O, hav- J. L. LOGAN. 

